From: Christoph Hellwig <hch@infradead.org>
Date: Wed, 29 Feb 2012 09:53:48 +0000 (+0000)
Subject: xfs: use per-filesystem I/O completion workqueues
X-Git-Tag: v3.4-rc1~121^2~17
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aa6bf01d391935a8929333bc2e243084ea0c58db;p=pandora-kernel.git

xfs: use per-filesystem I/O completion workqueues

The new concurrency managed workqueues are cheap enough that we can create
per-filesystem instead of global workqueues.  This allows us to remove the
trylock or defer scheme on the ilock, which is not helpful once we have
outstanding log reservations until finishing a size update.

Also allow the default concurrency on this workqueues so that I/O completions
blocking on the ilock for one inode do not block process for another inode.

Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ben Myers <bpm@sgi.com>
---

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